Collateral for a security interest recorded Dec 27, 2022 (Owl Rock Opportunistic Master Fund I, L.P.).
Lapsed Jan 2, 2026 on the fee record · High confidence
20-year base term ends Nov 3, 2029
Second maintenance fee unpaid; grace period ended.
Held by ADC Therapeutics S.A.
Filed May 3, 2011 as application 13/127,439 · Granted Jan 2, 2018
Base term, 20 years from filing
Today
Lapsed Jan 2, 2026
2009
2029
Clock starts
Nov 3, 2009
Nov 3, 2009
No longer in force
Jan 2, 2026
Jan 2, 2026
Granted
Jan 2, 2018
Jan 2, 2018
Term would have run to
Nov 3, 2029
Nov 3, 2029
base term
after the term ends
fee events
Updated Nov 15, 2026 · includes USPTO assignment & status data published Nov 15, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know
None
Term adjustment
No prosecution delay on this record.
None
Terminal disclaimer
No disclaimer on this record.
1 of 2
Maintenance fees paid
Two maintenance fees can end this term early, the ones due 3.5 and 7.5 years from grant; the third one's grace period runs past the term end. This counts the ones the record shows paid.
38
Family applications on record here
Applications sharing this one's continuity chain whose file history this site holds. The family may have others.
Its term would have run to Nov 3, 2029: its 20-year base term, with no adjustment for prosecution delay. Confidence: High. from the record
How we calculated this date
One row per rule, each showing its own input and what it did to the date. A step we could not verify says so instead of resolving itself.
| Step | Input | Date after this step | Confidence |
|---|---|---|---|
| Base term, 20 years from filing | Clock starts Nov 3, 2009, when application PCT/CA2009/001586, the earliest non-provisional in its chain, was filed (this one was filed May 3, 2011) | Nov 3, 2029 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | None on file | no change | High confidence |
| Terminal disclaimer cap | None on record | no cap applied | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 1 of 2 maintenance fees paid | lapsed Jan 2, 2026 | High confidence |
| Computed term end | The steps above, in order | Jan 2, 2026 | High confidence |
This family
| Application 19/598,121 | Pending not computed | not computed |
| US 7,947,436 | Lapsed on the fee record May 2015 | May 2015 |
| US 8,044,179 | Term ended Nov 2026 | Nov 2026 |
| US 8,216,582 | In force Aug 2028 | Aug 2028 |
| US 8,426,562 | Term ended Nov 2026 | Nov 2026 |
| Application 13/082,107 | Abandoned not computed | not computed |
| US 9,855,291 | this patent Jan 2026 | Jan 2026 |
| US 8,580,257 | Lapsed on the fee record Nov 2025 | Nov 2025 |
8 of 38 applications in this family shown, earliest filings first. The applications whose file history this site holds. The family may have others.
Assignments
Assignment documents as recorded at the USPTO, oldest first, with the reel and frame each was recorded at. A recorded assignment is a filed document, not a statement of current ownership, and the absence of a later one is not evidence that the last one still stands.
| Recorded | Assignor | Assignee | Conveyance |
|---|---|---|---|
| Mar 29, 2012 Reel 27952, frame 500 | Sulea, Traian | National Research Council of Canada | Assignment of Assignor's Interest |
| Mar 29, 2012 Reel 27952, frame 754 | Tremblay, Gilles Bernard; Filion, Mario | Alethia Biotherapeutics Inc. | Assignment of Assignor's Interest |
| Oct 17, 2013 Reel 31425, frame 17 | National Research Council of Canada | Alethia Biotherapeutics Inc. | Assignment of Assignor's Interest |
| Jun 30, 2017 Reel 42880, frame 186 | Alethia Biotherapeutics Inc. | ADC Therapeutics S.A. | Assignment of Assignor's Interest |
| May 19, 2020 Reel 52696, frame 247 | ADC Therapeutics S.A. | Deerfield Partners, L.P., as Grantee | Security Interest |
| Jun 30, 2020 Reel 53094, frame 602 | ADC Therapeutics S.A. | Deerfield Partners, L.p. | Security Interest |
| Aug 16, 2022 Reel 61200, frame 750 | Deerfield Partners, L.p. | ADC Therapeutics S.A. | Termination and Release of Patent Security Agreement |
| Dec 27, 2022 Reel 62228, frame 763 | ADC Therapeutics S.A. | Owl Rock Opportunistic Master Fund I, L.P. | Patent Security Agreement |
Sources
Google Patents · The patent document at USPTO · Assignment records at USPTO
USPTO account required: This application in Patent Center · USPTO's maintenance fee lookup
Maintenance fee events come from USPTO's own fee records. Its fee lookup asks for the patent number and the application number.
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
Citations
12
later US patents cite this one
That is top 25% of utility patents granted in 2018 in our data, the only group it is compared against.
How we rank
Every date shows its work: the base term, any term adjustment or extension, any disclaimer cap, and the maintenance fee record, each with a confidence tier. How this record was built
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.